AbstractAbout AuthorsReferences
Information on the methods of obtaining hydrophobic coatings based on a suspension of finely dispersed silicon dioxide (particle size is 195±95 nm) is given. The suspension was obtained by mechanical activation on a colloidal mill of low-quality (silicon dioxide content is less than 90%) polymineral quarry sand of “Kholmogorskoe” deposit (Arkhangelsk region). Glass substrates and wood samples (Scots pine) were used as the basis for the synthesized coating. Obtaining superhydrophobic coating was performed in two ways. The first method consisted in active spontaneous sedimentation of solid phase particles of suspension on the substrate surface by breaking the aggregate stability of the system due to changes in the protolytic properties of the dispersion medium. The second method differed from the first in that the resulting surface layer of finely dispersed particles of silica-containing raw materials was additionally treated with a paraffin-containing aqueous emulsion. The hydrophobicity of the surface was characterized by the wetting angle. The obtained results showed that for the formation of a stable hydrophobic coating with an contact angle of 90–120о, the use of fine silica is sufficient, for increasing the wetting angles (>120о), it is possible to use a hydrophobisator based on a paraffin emulsion. The greatest limiting wetting angle (156о) is obtained on wood with a layer-by-layer coating with a suspension of the following composition: fine silica – paraffin.
V.E. DANILOV, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
M.A. TUROBOVA, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)
A.M. AYZENSHTADT, Doctor of Sciences (Chemistry) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
Ya.M. RUSINOVA, Graduate Student (This email address is being protected from spambots. You need JavaScript enabled to view it.)
M.A. TUROBOVA, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)
A.M. AYZENSHTADT, Doctor of Sciences (Chemistry) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
Ya.M. RUSINOVA, Graduate Student (This email address is being protected from spambots. You need JavaScript enabled to view it.)
Northern (Arctic) Federal University named after M.V. Lomonosov (17, Severnaya Dvina Embankment, Arkhangelsk, 163002, Russian Federation)
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2. Boinovich L.B., Emelyanenko A.M. Hydrophobic materials and coatings: principles of design, properties and applications. Uspehi himii. 2008. Vol. 77. Iss. 7, pp. 619–638. (In Russian).
3. Prasad G, Anand Prabu A. A short review on hybrid PVDF-nanomaterials based super-hydrophobic coatings. Research Journal of Pharmaceutical, Biological and Chemical Sciences. 2016. No. 7 (2), pp. 1808–1818.
4. Ogihara H., Xie J., Saji T. Controlling surface energy of glass substrates to prepare superhydrophobic and transparent films from silica nanoparticle suspensions. Journal of Colloid and Interface Science. 2015. No. 437, pp. 24–27.
5. Kousaalya A.B., Garg N., Kumar R. Silica-based superhydrophobic coating by a single-step process. Surface Innovations. 2013. Vol. 1, Iss. 3, pp. 173–180. https://doi.org/10.1680/si.12.00014
6. Kozhukhova M.I., Chulkova I.L., Kharkhardin A.N., Sobolev K.G. Estimation of application efficiency of hydrophobic water-based emulsions containing nanoand micro-sized particles for modification of fine grained concrete. Stroitel’nye Materialy [Construction Materials]. 2017. No. 5, pp. 92–97. DOI: https://doi.org/10.31659/0585-430X-2017-748-5-92-97. (In Russian).
7. Kozhuhova M.I., Flores-Vivian I., Rao S., Strokova V.V., Sobolev K.G. Complex siloxane coating for super-hydrophobicity of concrete surfaces. Stroitel’nye Materialy [Construction Materials]. 2014. No. 3, pp. 26–30. (In Russian).
8. Manafi S., Nasab M.M. Hydrophobic coating production with its hydrophobic properties and pollution selfremoved by concentrations of silica nanoparticles. Bulgarian Chemical Communications. 2015. Vol. 49. Special Issue J, pp. 266–272. http://www.bcc.bas.bg/BCC_Volumes/Volume_49_Special_J_2017/BCC-49-J-2017-266-272-Manafi-37.pdf
9. Jean-Denis Brassard, D.K. Sarkar and Jean Perron, Fluorine based superhydrophobic coatings. Applied Sciences. 2012. No. 2, pp. 453–464. DOI: 10.3390/app2020453
10. Junpeng Liu, Zaid A. Janjua, Martin Roe, Fang Xu, Barbara Turnbull, Kwing-So Choi and Xianghui Hou. Super-hydrophobic/icephobic coatings based on silica nanoparticles modified by self-assembled monolayers. Nanomaterials (Basel). 2016. No. 6(12), pp. 232. doi: 10.3390/nano6120232
11. Tureshova G. O. Creation of superhydrophobic surfaces. Gorenie i plazmokhimiya: nauchnyi internet-zhurnal. 2016. Vol. 14. No 3, pp. 226–236. (In Russian).
12. Klishin A.V., Mironyuk A.V., Dudko V.A., Baklan D.V., Chashka-Ratushnyi V.P., Tarasenko D.V. Surface structure of superhydrophobic coatings based on silica. Scientific Journal «ScienceRise». 2016. No. 10/2 (27), pp. 61–66. (In Russian).
13. Danilov V.E., Ayzenshtadt A.M.. Protolytic properties influence of the dispersion medium on the process of silicic acid polycondensation. Journal of Physics: Conference Series. 2018. Vol. 1038. Nо. 1 (012140). DOI: 10.1088/1742-6596/1038/1/012140
For citation: Danilov V.E., Turobova M.A., Ayzenshtadt A.M., Rusinova Ya.M. Hydrophobic coatings based on low quality silica-containing raw materials. Stroitel’nye Materialy [Construction Materials]. 2019. No. 7, pp. 61–65. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2019-772-7-61-65